sûrement CPI, donc Conception et Production Industrielle

i'm a student from a "lycée" ( high school 11th Grade ) , in the STI section ( industrial sciences and technologies )
and , i spend all my time
all my time has to build mechanics object, has to draw them ect…

whoaou , thanks for all the comments !

Thats a really nice gun. I really like everything on it like all the metal parts but I would have to agree. The bottle chamber has to be replaced. Then I think it would be one of the better cannos on here.. By the way. Where did you get that part where the ...

i've make a SolidWorks drawing to explain how i've make the valve for the pump

is a ball which is plated by a spring on an O ring

soon I will try to put a bottle which holds the high pressure, because I have build a high pressure pump , full metal which goes up has 430 psi (30 bars)
there are a problem with the blowgun which go only to 150 psi!

here it is, it is very out of copper, with brass connections.
it is a system of ...

yeah , it's right , the air chamber was a little ghetto likes but it's a normal 3/4" , i can put my aluminum air chamber or a pvc chamber

a coca cola at 130 psi is an very dangerous air bomb , so i have put duck tape so that the bottle does not become deformed

Thanks a lot !

the gun run at 130 psi ( 9 bars ) and the air chamber it's an aluminum bicycle bottle , and i can put a maximum of 200 psi

the barrel is a high polished cooper tube :wink:

i love it because he have a exellent accuracy , next week i'm going to put a red-dot BSA 2x42 tactic ...

hi , i want to show you , one of my best airgun ,

there is a 1 meter x 18mm barrel
with a wood bolt action system
the air tank is a coca bottle at 8 bars ( 1.5litres or 0.5 )
i shoot potato and battery
he have a QEV system

on the video i shoot at a a4 paper at 10 meter :



http://img135 ...

Hi , i am clement , a 17 years old French boy who love build home made airguns

i'll show you a basic rifle with a home-made qev ( http://fr.youtube.com/watch?v=b4ZgXqiaySc )

its a gun with an aluminum air tank , a 16mm x 1000mm copper barrel and with a powerful blowgun

http://img379.imageshack ...